Even if individual signals are noisy, the aggregation layer is where things become powerful.

Adtech infrastructure wasn’t designed to identify a single user with perfect certainty — it was designed to correlate large volumes of probabilistic signals across time. Once you combine location hints, device fingerprints, behavioral patterns, and repeated bidstream events, the system doesn’t need a perfect identifier to narrow things down dramatically.

That’s why these datasets end up being useful for surveillance even if any single data point looks weak on its own.

Is it just me or is this an AI comment?